英语四级新闻听力复习讲解

　　下面小编跟大家一起了解英语四级新闻听力复习分享，希望对大家的学习有所帮助。
　　一、听力练习
　　1.
　　A. Doctors are advising parents to give babies crushed peanuts to reduce allergy risk.
　　B. Doctors are advising parents not to feed babies peanuts to avoid allergy risk.
　　C. Doctors are warning parents of the potential ricks of feeding babies peanuts.
　　D. Doctors are developing vaccines against potential ricks of peanuts to children.
　　2.
　　A. Skin conditions.
　　B. Difficulty breathing.
　　C. Low blood pressure.
　　D. Hight blood pressure.
　　二、听力文本
　　Doctors are advising parents to feed babies peanut products before their first birthday to reduce the child's risk of developing a peanut allergy. A team of allergy experts and childcare specialists wrote the new guidance. They suggest adding soft, crushed peanuts to a baby's diet beginning at four months of age. The new guidance is a "complete reversal" from earlier advice to parents. Earlier guidelines suggested waiting to feed children peanut products until they were much older. Peanut allergies usually develop before age 2. They are a major worry for parents, who need to closely watch everything their children eat inside and outside the home. Allergic reactions to peanuts can include skin conditions, difficulty breathing and low blood pressure. The person can feel sick to the stomach, and develop swelling of the tongue, eyes or face. In severe cases, a peanut reaction can kill, unless the child is given an injection of epinephrine. Because of such risks, doctors had been urging parents to avoid giving peanut products to babies. But a 2015 study led medical experts to reconsider the guidelines. The study involved 640 babies, all of whom were younger than 11 months. Researchers found that when these high-risk babies were fed a small amount of peanut butter three times a week, only three percent went on to develop the allergy after five years. By comparison, 17 percent of children who avoided peanuts became allergic. In the new guidelines, the experts propose introducing peanut protein as one of a baby's first foods. The method of early introduction has also been tested with other major allergenic foods, like milk, egg, fish and wheat. The method has been especially effective for both egg and peanut allergies, experts note.

　　Question 1: What’s the main idea of this news report?
　　Question 2: According to the news report, which of the following is not an allergic reactions to peanuts?
　　三、重点词汇
　　1. allergy: a condition that makes a person become sick or develop skin or breathing problems because they have eaten certain foods or been near certain substances 变应性；过敏反应；过敏性
　　2. reversal: the act of changing or making something change to its opposite 反向；倒转；倒退；推翻
　　3. swelling: a part of your body that has become bigger because of illness or injury 肿大处，肿胀处；肿块
　　4. injection: the act of putting a liquid, especially a drug, into a person's body using a needle and a syringe (= small tube) 注射
　　5. epinephrine: a hormone that is made naturally in the body and may be given as a drug 肾上腺素
　　四、背景知识
　　花生是重要的食物过敏原，可能会引起极其严重的过敏症。花生过敏的症状包括：血压降低、面部和喉咙肿胀，这些都会阻碍呼吸，从而导致休克。据英国研究人员统计，在英国，每200个人当中有大约一人对花生敏感。虽然部分人只是对花生有轻度过敏反应，但是，花生也会令一些人出现过敏性休克。花生过敏这种过敏通常在儿童时期引发，并伴随终生。对花生过敏的人，哪怕是吃下极为微量的花生或花生油都会引发严重的过敏反应。同时，花生过敏也是食物过敏中导致死亡人数高的一种。90%因食物过敏引发的死亡都是由花生导致的，仅在美国，每年就有约100人死于花生过敏引发的过敏性休克。
　　五、参考答案
　　Question 1: A
　　Question 2: D